Habitat loss has isolated already small populations of wild tapirs, putting each group in greater danger of dying out completely.

These impoundments also isolate populations, which further endangers the species.

The lack of geographic constraint in isolating sympatric populations implies that the emerging species avoid interbreeding via other mechanisms.

Some species have only isolated populations, surviving in small sections of ancient rainforest.

There are also isolated, introduced populations in the Carolinas, Georgia, and northern Florida.

So what we have tried to do is to isolate discrete populations that seem to be most in need and try to offer them help.

Dams also created habitat fragmentation and restricted the movement of the fish, isolating populations from one another.

The decision set a precedent for greater limits placed on public health authorities seeking to isolate diseased populations.

Slow lorises have lost a significant amount of habitat, with habitat fragmentation isolating small populations and obstructing biological dispersal.

The formation of barriers to dispersal or gene flow between adjacent areas can isolate populations on either side of the emerging divide.